 (defn register-handler
   "Deprecated. Use `reg-event-db` instead."
   {:deprecated "0.8.0"
-   :api-docs/heading "Events"}
+   :api-docs/heading "Deprecated"}
   [& args]
   (console :warn  "re-frame: \"register-handler\" has been renamed \"reg-event-db\" (look for registration of " (str (first args)) ")")
   (apply reg-event-db args))

  `id` is typically a keyword. If it supplied when an `f` is added, it can be 
  subsequently be used to identify it for removal. See `remove-post-event-callback`.
  "
  {:api-docs/heading "Events"}
  ([f]
   (add-post-event-callback f f))   ;; use f as its own identifier
  ([id f]


  The checkpoint includes `app-db`, all registered handlers and all subscriptions.
  "
  {:api-docs/heading "Miscellaneous"}
  []
  (let [handlers @registrar/kind->id->handler
        app-db   @db/app-db
